... , clicking it, the light is brighting, and then clicking again, the lights goes out. It is a cool "big button", is it? When the weather becomes colder ... to you!Specifications:1.Lamp itself is switch button, just a single click, easy to turn on and off by upside down or ... as Visual Inspection, Hi-pot test, Aged Test and so on.Production line test: With work team or data engineer who ...